Diphenyl-methanes



United States Patent 0 3,247,199 (Bid-TERTIARY AMlNfl-ALKOXY} lDlPHENYL-ME'E HANE Adrian Marxcr, Muttenz, Alan Francis Thomas, Vernier- Geneve, and Atso Eivespaii, Neu-Allschwil, Switzerland, assignors to Qiba Corporation, New York, N.Y., a corporation of Delaware No Drawing. Filed Jan. 24, 1962, Ser. No. 168,542 Claims priority, application Switzerland, .l'an. 27, 1961, 995/61; Dec. 6, 1961, 14,150/61 13 Claims. (Cl. 260-246) The present invention relates to new phenoxyethers. More especially it concerns dialkyl-bis-(paratertiary aminoalkoxy-halogenophenyl)-methanes in which the alkyl groups at the methylene group may be linked together, and their salts.

In the new compounds the alkyl radicals attached to the methylene group may be identical or different from one another and represent preferably lower alkyl groups with 1 to 5 carbon atoms, such as methyl, ethyl, propyl, isopropyl, or straight or branched butyl or pentyl groups which may be bound in any desired position.

When the alkyl radicals are linked, they together form an alkylene radical, for example a lower alkylene radical, such as a tetraznethylene or pentamethylene radical.

The alkylene radicals, which in the tertiary aminoalkoxy-halogenophenyl groupings link the tertiary amino groups to the oxygen atoms, are preferably unbranched or branched lower alkylene groups with 2 to 5 carbon atoms, which separate the tertiary amino group from the oxygen atom by at least 2 carbon atoms, such as ethylene groups, or unbranched or branched propylene, butylene or pentylene groups.

The phenylene radicals contain especially 1 to 2 halogen atoms each. The halogen atoms are preferably chlorine or bromine atoms and are advantageously in orthoposition to the tertiary aminoalkoxy group.

As substituents of the tertiary amino group there are particularly suitable lower hydrocarbon radicals which may be interrupted by hetero atoms, such as oxygen, sulfur or nitrogen, and may be bound to the alkylene radical, and/ or they may be substituted by free hydroxyl, amino or mercapto groups or by halogen atoms, such as fluorine, chlorine or bromine. Particularly suitable lower hydrocarbon radicals are: lower alkyl or alkenyl radicals, such as methyl, ethyl, propyl, isopropyl, or unbranched or branched groups, linked in any desired position, including butyl, pentyl, hexyl or heptyl radicals, allyl or methallyl radicals, unsubstituted or alkylated cycloalkyl or cycloalkenyl groups such as cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl or cyclohexenyl radicals; unsubstituted or alkylated cycloalkylor cycloalkenyl-alkyl groups such as cyclopentylor cyclohexeny-l-methyl, -ethyl or pr0pyl radicals; aralkyl or aralkenyl such as phenylmethyl-, -ethyl, -vinyl or propyl groups, or alkylene or alkenylene radicals such, for example as 1:4-butylene, 1:5-pentylene, 1:S-dimethylpentylene-(l:5), 1:6-hexylene or 1:5-hexylene. Radicals or these types that are interrupted by hetero atoms are, for example, alkoxyalkyl or oxacycloalkyl-alkyl radicals, such as methoxyethyl, ethoxyethyl, propoxyethyl, butoxyethyl, methoxypropyl, methoxyet-hoxyethyl, tetrahydrofurylmethyl, methylmercaptoethyl, oxa-, azaor thia-alkyleneor -alkenylene radicals such as Z-aZabutene-(I:2)-ylene-(1:4), Z-aza, oxaor thia-butylene-(l:4) groups, 2-aza-pentene-(l:2)- ylene(-1:5), 3-aza-, oxaor thia-pentylene-(1:5), 3-azahexy'lene-(lz6), 1:5-dimethyl 3 azapentylene-(l :5), 3- methyl-3-aza-pentylene-(1:5) or 3 -hydroxyethyl-3-azapentylene-(lzS). Tertiary aminoalkoxy radicals, in which a substituent of the tertiary amino group is linked with the alkylene radical, are for example N-alkyl-pyrrolidinyl-2- or -3-alkoxy radicals or N-a-lkylpiperidyl-Z- or -3-alkoxy radicals.

The amino group is primarily a di-lower alkylamino group such as the dimethylamino, diethylamino, diproylamino, N-methyl-N-ethylamino group, an N-lower alkyl- N-cycloalkylamino group such as the N-methyl-N-cyclopentyl or -cyclohexyl group, or a pyrrolidino, piperidino, morpholino or thia-morpholino group such as the pyrrolidino, piperidino, morpholino, piperazino or N-methylpiperazino group.

The new compounds possess valuable pharmacological properties. Inter alia, they display an antipyretic, analgesic and anti-inflammatory action. More especially they have an antiparasitic, such as an amoebicidal and trypanocidal action, which enables them to be used pharmacologically or as medicaments in human and veterinary medicine. They are also useful as intermediate products for the preparation of medicaments.

Of special value are the compounds of the formula above, and their salts, and the compounds of the formula in which Hal, A, n and R to R have the meaning given above, and salts of these compounds.

The new compounds are obtained in known manner; preferably, a reactive ester of a tertiary aminoalkanol is reacted upon a compound of the formula where in R and R represent alkyl groups which may be linked together and the symbols Ph represent halogenated para-phenylene radicals, preferably in the form of a metal salt thereof such, for example, as an alkali metal salt, or in the presence of a condensing agent forming such a salt. Reactive esters are, for example, those with strong inorganic or organic acids, preferably those of hydrohalic acids such as hydrochloric, hydrobromic or hydriodic acid, or of arylsulfonic acids, such as benzenesulfonic or toluenesulfonic acid.

The afore-mentioned reaction is performed in a man ner known per se, in the presence or absence of a diluent, at room temperature or a lower or higher temperature, under atmospheric or superatomsphe-ric pressure.

Depending on the reaction conditions used, the new compounds are obtained in the form of the free bases or of their salts. From the salts the free amine bases can be prepared in the known manner. From the amine bases, on the other hand, salts can be prepared by treatment with acids that yield therapeutically useful salts, such, for example, as a hydrohalic acid, sulfuric, nitric, phosphoric, thiocyanic, acetic, propionic, oxalic, malonic, tartaric, succinic, malic, methanesulfonic, ethanesulfonic,

Patented Apr. 19, 1966 'hydroxyethanesulfonic, benzenesulfonic or toluenesulfonic acid, or other therapeutically acceptable acids.

The salts of the new compounds may also be used for purifying the bases obtained, for example, by converting a base into a salt thereof, separating the latter and reconverting it into the base.

The starting materials are known or can be made by known methods.

The invention includes also any variant of the present process in which an intermediate obtained at any stage thereof is used as starting material and the remaining step or steps is/ are carried out, or the process is discontinued at any stage thereof, or the starting materials are formed under the reaction conditions. For example, a corresponding dialkyl-(para-tertiaryaminoalkoxy-halogenphenyl)-(para-hydroxy-halogenphenyl)-methane, may be reacted with a reactive ester of a tertiary aminoalkanol.

In this way, for example, compounds may be obtained in which the two tertiary amino groups are not identical.

The new compounds can be used as medicaments, for example in the form of a pharmaceutical preparations containing them or their salts in admixture with an organic or inorganic, solid or liquid pharmaceutical excipient suitable for enteral, local or parenteral administration. Suitable excipients are substances that do not react with the new compounds such, for example, as water, gelatine, lactose, starches, magnesium stearate, talc, vegetable oils, benzyl alcohols, gums, polyalkylene glycols, white petroleum jelly, cholesterol or other known medicinal excipients. The pharmaceutical preparations may be, for example, tablets, dragees, ointments or creams, or in liquid forms solutions, suspensions or emulsions. They may be sterilized and/or may contain assistants such as preserving, stabilizing, wetting or emulsifying agents, salts for regulating the osmotic pressure, buffers and/or solution promoters. They may also contain further therapeutica lly valuable substances. The preparations are formulated by conventional methods.

The following examples illustrate the invention:

Example 1 A solution of 2.3 grams of sodium in 100 cc. of ethanol is treated with 19 grams of dimethyl-bis-[3-bromo-4- hydroxyphenyl1-methane in 200 cc. of ethanol. A solution of 15 grams of fi-diethylamino-ethylchloride in 70 cc. of benzene is then added dropwise, and the :whole is refluxed for 2 hours, cooled, filtered and evaporated to dryness in vacuo. The residue is dissolved in a mixture 4 Example 2 A solution of 2.3 grams of sodium in 200 cc. of ethanol is treated with 38.6 grams of dimethyl-bis-[3-bromo-4- hydroxyphenyH-methane in 200 cc. of ethanol. A solution of 15 grams of fl-diethylamino-ethylchloride in cc. of benzene is slowly added dropwise, and the whole is refluxed for 2 hours, then cooled, filtered, and evaporated to dryness in vacuo. The residue is dissolved in a mixture of 300 cc. of ether and cc. of ethyl acetate and the resulting dimethyl-[3-bromo-4-(fl-diethylaminoethoxy)-phenyl]-[3'-bromo-4-hydroxyphenyl1 methane of the formula 1 is extracted with 200 cc. of 2 N-hydrochloric acid. The hydrochloric acid extract is neutralized with 200 cc. of 2 Nsodium hydroxide solution, the precipitated base is once more taken up in ether-l-ethyl acetate, then dried with sodium sulfate, and the solvents are evaporated. The monocitrate melts at 127 C. (from alcohol).

The resulting dimethyl-[3-bromo-4-(fl-diethyl-arninoethoxy)-phenyl]-[3-brorno-4'-hydroxy-phenyl] methane is reacted in a manner analogous to that described above with 15 grams of fl-diethylaminoethyl chloride dissolved in 70 cc. of benzene and worked up as described in Example 1, to yield dimethyl-bis-[3-bromo-4-(fl-diethylamino-ethoxy)-phenyl]-methane-dicitrate which is identical with the dicitrate described in Example 1.

Example 3 19.2 grams of solid dimethyl-bis-[3-bromo-4-hydroxyphenyl]-methane are stirred into a solution of 2.3 grams. of sodium in 200 cc. of ethanol.

A solution of 18.5 grams of B-dimethylamino-ethylchloride hydrochloride in 25 cc. of water is mixed with: 35 cc. of a concentrated solution of potassium carbonate. The precipitated chlorine base is taken up in 100 cc. of benzene, the benzene solution is dried and added dropwise to the solution of the diphenylmethane derivative- The mixture is refluxed for 3 hours, then filtered, concen-- trated to about one third of its volume, and the concen-' trate is treated with 50 cc. of 2 N-alcoholic hydrochloric acid, to yield the dihydrochloride of dimethyl-bis-[3- bromo-4-(B-dimethylamino-ethoxy)'phenyl]-rnethane of the formula of 300 cc. of ether and 100 cc. of ethyl acetate, and the resulting dimethyl-bis-[3-bromo-4-(B-diethylaminoethoxy)-pheny1]-methane of the formula C a 1 Br which melts at 201 C. after recrystallization from isopropanol.

Example 4 A solution of 2.3 grams of sodium in 200 cc. of ethanol is treated with 19.2 grams of dimethyl-bis-[3-bromo-4- hydroxyphenyl]-methane. From 21 grams of -dimeth-- ylaminopropylchloride hydrochloride the base is liberated. as described in Example 3, taken up in benzene and added dropwise at room temperature to the solution of diphenyl-- methane; the mixture is boiled for 3 hours, then filtered and evaporated. The residue is dissolved in 100 cc. of a lcl-mixture of alcohol and ether and treated with 50 cc. of 2 N-alcohol hydrochloric acid. The dihydrochloride of dimethyl-bis- [3-bromo-4- ('y-dimethylaminopropoxy phenyl1-methane of the formula crystalline dicitrate is filtered off and recrystallized from alcohol. It melts at 129131 C.

is precipitated with ether and recrystallized. from iso propanol. It melts at 206 C.

6 Example 5 lization from a mixture of isopropanol and ethyl acetate A solution of 2.3 grams of sodium in 200 cc. of alcohol melts at is reacted With grams of dimethyl-bis-[3-chloro-4-hy- Example 8 droxyphenyH-methane as described in Example 4-, and 2.3 grams of sodium in 100 cc. of ethanol, 10.3 grams the resulting di-sodiu-m salt is treated dropwise with 15 5 of dimethyl-bis-[3:5-dichloro-4-hydroxyphenyl1-methane grams of fi-diethylamino-ethylchloride in 70 cc. of benand 15 grams of ,G-diethylamino-ethylchloride in 70 cc. of zene. The mixture is refluxed for 3 hours, then filtered benzene are reacted as described in Example 1, and the and evaporated in vacuo. The residue is dissolved in 50 resulting dimethylbis-[3:5-dichloro4-(fl-diethylaminocc. of alcohol, treated with 19 grams of citric acid, and ethoxy)-phenyl]-methane of the formula or or 3 l (C2H5)2N-CH2-CHz-O@fi3-OCH2CH2N(CzH5)2- HCl C a Cl 01 the dicitrate of dimethyl-bis-[3-chloro-4-(,B-diethylaminois converted into the dihydrochloride which, after recrysethoxy)-phenyl]-methane of the formula tallization from isopropanol+ether, melts at 207208 C.

CH (C2 5)2NC 2-CH2-0+--0C 2C 2N(O2 5)2-Dicitrate CH2 O1 01 is caused to crystallize out by the addition of ether. After Example 9 recrystallization from ethanol of 90% strength it melts 2 grams f Sodium, 100 f ethanol, 183 grams at of dhnethylbis-[3 :5-dichloro-4-hydroxypheny1]-methane Example 6 and 21 grams of ydirnethylamino-propylchloride hydro- A solution of 2.3 grams of sodium in 100 cc. of ethanol chloride are reacted and Worked up by the method deis treated with 15 grams of di-methyl-bis-[3-chloro-4-hyscribed in Examples 6 and 7, and the resulting dimethyldroxyphenylJ-methane. A benzolic dimethylaminoprobis- [3:5-dichloro-4-(' -dirnethylamino-propoxy)-phenyl]- pylchloride solution is prepared by reacting a solution of methane of the formula or G1 l ([3333 (CHs)2N-OH2CH2CH2O-SJO-CH2CHz--CH2-N(CH3)2 I CH3 I c1 c1 21 grams of -dimethylarnino-propylchloride hydrochlois converted into the dihydrochloride which, on recrystalride in 25 cc. of water with 50 cc. of concentrated potaslization from a mixture of isopropanol and ethyl acetate, sium carbonate solution and taking up the reaction prodmelts at 232 C.

uct in 150 cc. of benzene, and then stirred dropwise at room temperature into the above-described solution of the di-sodium salt. The Whole is refluxed for 3 hours, 40 A u ion of 23 g ams of sodium in 100 cc. of abso- Example 10 filtered and treated With cc. of 2 N-alcoholic hydro- 4 81 9 is IniXed With a Solution of grams 9 chloric acid. By adding ether the dihydrochloride of didImethY1'bIS-[355-dibf0m0'4-11Ydf0XYPhe11Y11'Inethane 1H methy1-bi5-[3-chl01-0 4 di th l i 200 cc. of absolute alcohol. In the course of 5 minutes h ly h f th fo la 14.9 grams of ,B-diethylamino-ethylchloride in 50 cc. of

(IJHa is caused to precipitate; after recrystallization from iso 50 absolute benZPne f then addfid dTOPWiSB and the reacpropanol it melts at 197493 C tron mixture is st1rred and refluxed for 6 hours and then allowed to cool. The precipitated sodium chloride is Example 7 filtered off, and the mother liquor is evaporated to dry- By the method described in Example 6 the base is ness. The oily residue is taken up in ether, extracted by liberated from 18.5 grams of fi-dimethylamino-ethylchlobeing shaken twice with 2 N-sodium hydroxide solution, ride hydrochloride, then dissolved in benzene and added dried with sodium sulfate and converted With alcoholic dropwise to a solution prepared in the following manner: hydrochloric acid into the dihydrochloride of dimethyl- A solution of 2.3 grams of sodium in 100 cc. of ethanol bis-[3:5-dibromo-4-(fl-diethyl amino ethoxy)-phenyl]- is treated With 18.3 grams of dimethyl-bis-[3:S-dichloromethane of the formula 1'31 (EH3 1|5r (C2H5)2NCH2-GH2-O?OCH2CH2-N(C2H5)2-2HC1 I CH8 Br Br 4-hydroxyph'enyl]-methane. The mixture is refluxed for which settles out and, after recrystallization from iso- 3 hours, then filtered and evaporated to dryness in vacuo. p p -ly acetate, melts at 2084990 With The crystalline base is dissolved in alcohol and converted composition. with 50 cc. of 2 N-alcoholic hydrochloride into the dihy- Example 11 dmchloride 0f y -B -'(fiy A solution of 4.8 grams of sodium in 200 cc. of absolute y)r y lt ne 0 the formula alcohol is mixed with a solution of 27.2 grams of dimethyl- C1 C1 bis-[3:5-dibromo-4-hydroxyphenyl]-rnethane in 200 cc.

E I absolute alcohol. 20.47 grams of -diethylamino-propyl- (C a)2N-OH5CHz-O o- -0-CII2-CH2'N(CH3)Z chloride hydrochloride are then added and the reaction I ([3133 mixture is refluxed and stirred for 6 hours, and then 01 O1 allowed to cool. The precipitated sodium chloride is which, on addition of ether crystallizes, and after recrystalfiltered off, and the mother liquor is evaporated to dryness.

7 8 The residue is boiled for a short time with 100 cc. of ethyl Example 14 .acetate, filtered, treated with 50 cc. of 2.45 N-alcoholic hydrochloric acid and evaporated to dryness. The oily A SOIUUOH f grams of residue is dissolved in a small amount of isopropanol and y y-p y y in 100 Of absolute -.ethyl acetate is added until crystallization sets in. After 5 alcohol is added in one portion to a solution of grams one hour the precipitated dimethyl-bis-[3:5-dibromo-4- of Sodium in 100 Of absolute alcohol, grams of y-dieths lamin -pfopoXY)-phenyl] th dih d hl chlorethyldiethylamine dissolved in 50 cc. of absolute ride of the formula benzene are then added dropwise in the course of about Br Br CH: (C2H5)2NCH2CHz-CHr-O--OCIIzCH2CHgN(C H -2HCl l (I311: Br Br is suctioned off, washed with ethyl acetate and dried. It 10 minutes, with stirring, to the reaction solution. Stirring melts at 205-206 C, is continued for 6 hours under reflux, the reaction mixture Example 12 allowed to stand overnight, the precipitated sodium chloride filtered off and the alcoholic filtrate evaporated A Solution of grams of B fito dryness to yield pentamethylene-bis-[3:5-dichloro-4- hydroxy-phenyD-propane in 200 cc. of absolute alcohol (-diethylaminoethoxy)-phenyl]-methane of the formula (C2Ht)2N-CH2CH2O- /C\ OCH2CH2N(CzHs)2 1 H2O CH: 01 I I Cl H2C\ /CH2 CH2 is added in one portion to a solution of 4.6 grams of as an almost colorless, viscous oil.

By dissolving the product in 100 cc. of absolute alcohol and adding an alcoholic solution of the calculated quantity sodium in 200 cc. of absolute alcohol. 18.6 grams of morpholinoethyl chloride hydrochloride are then added, 30

the reaction mixture stirred under reflux for 6 hours and of citric acid, it is converted into the dicitrate melting at left to stand at room temperature overnight. The crysl25l26 C. talline precipitate is suction-filtered, washed first with Example 15 alcohol, then with water and dried to yield dimethyl-bis- [315-dibr0mo-4-(morpholino-ethoxy)-phenyl]-methane of By the process described in the preceding example and the formula using 2.17 grams of sodium, 15.9 grams of 1:1-bis-(3- Br Br 0 I N-CHr-CHz-O- C- -CH2CH:N

0H, Br Br melting at 120-122 C. chloro-4-hydroxy-phenyl)-cyo1ohexane and 12.8 grams For conversion into the dihydrochloride the base is disof chlorethyldiethylamine, there is obtained pentarnethylsolved in cc. of absolute alcohol which contains the ene bis-[3 chloro 4 (diethylamino-ethoxy)-phenyl]- calculated quantity of hydrochloric acid gas. After a methane of the formula l )C 2H5) :N-CH2-CH20- /C\ 0 Hr-C r-N (C 2115) 2 H10 (311: H2O /CH2 CH1 short time the dihydrochloride begins to precipitate. It The dicitrate of this base melts at 121 C.-123 F. is suction-filtered, washed with alcohol and dried. The What is claimed is: product melts at 206-207 C. 1. Dimethyl-bis-[4-(fl-dimethylaminoethoxy)-3-bromo- Example 13 p y 2. Dimethyl bis-[4-(B-diethylaminoethoxy)-3chlorophenyl] -meth ane.

3. Dimethyl bis-[4-(/S-diethylaminoethoxy)-3-bromophenyl]-methane.

4. Dimethyl bis [4-(,B-diethylaminoethoxy)-3:S-dibromophenyl1-methane.

5. Dimethyl bis [4-( -dimethylamino-n-propoxy)-3- A solution of 19.3 grams of 13:,3-bis-(3-bromo-4-hydroxy-phenyl)-propane in 100 cc. of absolute alcohol is added in one portion to a solution of 4.6 grams of sodium in 200 cc. of absolute alcohol. "18.6 grams of morpholinoethyl chloride hydrochloride are then added, the reaction mixture stirred for 6 hours under reflux and left to stand at room temperature overnight. The precipitated sodium chloride is filtered off and the alcoholic mother liquor l y levaporated to dryness to yield dimethyl-bis-[3-bromo-4- Y -('vy 'P P Y)' (morpholino-ethoxy)-phenyl]-methane of the formula diohlorophenyll-methane.

Br Br CH: as a viscous oil.

By dissolving the oil in 100 cc. of ethyl acetate and '1- Dimothyl s -('vy -p p y)- adding the calculated quantity of alcoholic hydrochloric p y l' acid, the product may be converted into the dihydro- 8. Dimethyl bis[4 ('y diethylamino n propoxy)- chloride which melts at 234-237" C. 3:S-dibromophenyl]methane.

9. Dimethyl bis [4-(,8-morpholino-ethoxy)-3:S-dibromophenyl] -methane.

10 Dimethyl bis-[4-(li-morpholino-ethoxy)-3 bromophenyl] -meth ane.

11. Dimethyl- 4-hydroxy-3-bromo-phenyl -[4- (B-diethyl aminoethoxy -3 -brom ophenyl] -rnethane.

12. A member selected from the group consisting of compounds of the formula halogen halogen in which R and R each stands for lower alkyl, R and R each stands for a tertiary amino group in which the substituents are members selected from the group consistiing of lower alkyl, lower alkenyl, cyclopentyl, cyclohexyl, cycloheptyl, cyelophentenyl, cyclohexenyl, cyclopentyl-lower alkyl, cyclohexyl-lower alkyl penyl-lower alkyl, N,N-lower alkylene, N,N-mono-oxa-lower alkylene, N,N-mono-aza-lower alkylene and N,N-mono-thia lower alkylene, R and R each stand for a member selected from the group consisting of hydrogen and halogen and A and A each stands for lower alkylene having from 2 t carbon atoms and separating tertiary amino from oxy by at least two carbon atoms, and acid addition salts thereof.

10 13. A member selected from the group consisting of a compound of the formula thia-lower alkylene and an acid addition salt thereof.

References Cited by the Examiner UNITED STATES PATENTS 2,302,805 11/ 1942 Schussler 260-570 2,750,416 6/1956 Exner et a1. 260570 2,888,438 5/1959 Katz 260--570 2,914,563 11/ 1959 Allen et a1 260-294] 3,068,236 12/ 1962 Krapcho 260-293 OTHER REFERENCES Benoit et al.: Bulletin de la Societe Chemique des France (1951), pages 893 and 894.

NICHOLAS S. RIZZO, Primary Examiner.

IRVING MARCUS, Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent Non 3,247,199 April 19, 1966 Adrian Marxer et all It is hereby certified that error appears in the above numbered patent requiring correction and that the said Letters Patent should read as corrected below.

Column 8, line 74, for "bis [4" read bis [4 column 9, line 24, for "cyclophentenyl" read cyclopentenyl line 26, for "cyclohexyl-lower alkyl penyl -1ower" read cyclohexyl'lower alkyl, phenyl-lower column 10, line 10, for "form" read from (SEAL) Attest:

EDWARD J. BRENNER Commissioner of Patents ERNEST W. SWIDER Attesting Officer 

9. DIMETHYL - BIS - (4-(B-MORPHOLINO-ETHOXY)-3:5-DIBROMOPHENYL)-METHANE.
 12. A MEMBER SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULA 